back-reflection pinhole camera [材料科學]背面反射針孔照像機back-reflection focusing came [材料科學]背面反射聚焦照像機back-putting 背向推擲back-purge system [能源科學技術]反沖洗系統(tǒng)back-pull n.反拉back-propagation algorithm 反向傳播算法back-propagation 反向傳播back-projection reconstruction [電子、通信與自動控制技術]反投影重建back-project 反投影back-printing [電子、通信與自動控制技術]背后打印[計算機科學技術]背后列印back-pressure-relief port 反壓泄料孔back-pressure valve [油氣] 回壓閥 止回閥back-pressure regulator 背壓調節(jié)器back-pressure manometer [經(jīng)濟學]反壓壓力計back-pour n.補澆back-porch effect [電子、通信與自動控制技術]后沿效應[計算機科學技術]后緣效應back-porch n.后沿back-plate 制動塊底板,制動器底板back-planing 刨背back-pinched saw [經(jīng)濟學]夾背鋸